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Virtual Network

5 minutes 5 Questions

A virtual network is a type of logical network that allows devices and services to communicate with each other without being physically connected. A virtual network is created through software-based techniques, enabling a more flexible and efficient use of resources. In a virtual network, multiple …

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CompTIA Network+ - Virtual Network Example Questions

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Question 1

A software developer is using a hypervisor to run multiple virtual machines on their computer. They have noticed decreased performance on their development environment. What could be done to optimize the performance?

Correct Answer: Allocate more resources to the development VM

The developer can allocate more resources to the development VM to optimize the performance. Allocating more resources such as CPU, RAM, or disk space improves how the VM performs. On the contrary, adding physical switches to the network doesn't directly improve the performance of a VM as these primarily manage network traffic between devices. Switching to a different hypervisor could be a possible solution but it's not optimal since it involves a lot of setup and configuration time, and it's not guaranteed to solve the performance issue. Changing the IP addressing scheme does not affect the performance of a VM either; it just changes how the VMs are networked together.

Question 2

A network administrator needs to ensure that critical virtual machines are receiving priority access to network resources. What technique can be used to achieve this?

Correct Answer: Implement Quality of Service (QoS) policies

The best way to ensure that critical virtual machines are receiving priority access to network resources is to 'Implement Quality of Service (QoS) policies'. QoS policies can prioritize traffic to certain virtual machines or applications, ensuring critical systems are given the network resources they need. The other options are incorrect. Creating an additional VLAN could segment the network but wouldn't necessarily prioritize traffic. Enabling port mirroring is more for monitoring traffic than managing resource allocation. Configure split-horizon routing prevents route loops in a network and does not provide priority access to network resources to specific machines.

Question 3

A network administrator needs to establish a secure connection between two virtual networks across the internet. What is the best solution to achieve this?

Correct Answer: Implement site-to-site VPN

The task at hand is to create a secure connection between two virtual networks that are across the internet. The best solution here is to 'Implement a site-to-site VPN.' Virtual Private Networks (VPNs) create a secure path between two or more devices on the internet. Site-to-site VPNs are especially used for connecting distinct networks at different geographical locations, making it the ideal choice in this situation. 'Set up remote database replication' is not the appropriate answer because it deals with copying and maintaining database objects, which isn't relevant to creating a secure network connection. 'Enable remote desktop protocol' is also incorrect because while it does allow for remote connections, it is not specifically designed for forming a secure link between two networks. Finally, 'Install a next-generation firewall' although provides advanced security features, it does not set up a secure connection between two networks. Therefore the only answer that caters to all the requirements of the question is 'Implement a site-to-site VPN.'

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